POST-FIRE MECHANICAL PROPERTIES OF STRUCTURAL STEEL

1. SUMMARY This paper presents a review of the mechanical properties of structural steel exposed to fire and cooled down. The existing design codes do not provide satisfactory recommendations concerning the post-fire properties of steel or the post-fire performance of a steel member, which shows the need for further research on the topic. Experimental results from laboratory tests, including samples taken from real fire damaged steelwork, are collected herein. The available data are analyzed in order to evaluate the residual capacity of fire damaged steel, i.e. the elastic modulus, the yield and ultimate strength and the remaining ductility, which are related to its reuse. For this purpose, simplified formulas are proposed for the estimation of the post-fire mechanical properties of structural steel according to its type.